Talvivaara Mining Company Plc - Leakage detected at the gypsum pond

Stock Exchange Release
Talvivaara Mining Company Plc
5 November 2012


Leakage detected at the gypsum pond - metals production temporarily suspended


A leakage in the gypsum pond of the mine site of Talvivaara Mining Company Plc
("Talvivaara" or the "Company") was detected at 7.30 am (Finnish time) on Sunday
4 November 2012. The levees of the pond are intact, but water is filtering
through the lower part of the levee on the east side of the pond. The
authorities have been informed.

The root cause and the extent of the leakage are being investigated, and the
immediate safeguarding measures have been taken. The safety dams below the
gypsum pond will be utilized to contain the leakage within the mining concession
area. The water in the gypsum pond contains more metals and sulphates than
Talvivaara's normal purified discharge water.

As a precautionary measure, the Company's metals recovery plant has been
temporarily suspended in order to avoid further pumping of tailings into the
gypsum pond while the leakage is being repaired. The Company anticipates
restarting the metals recovery plant on Wednesday 7 November 2012. During the
shutdown, the piping installations required for the commissioning of the reverse
osmosis plants will also be completed. The piping installation work was
originally scheduled for a later date in November. The reverse osmosis plants
will be used to purify the sulphate-containing discharge waters, and they will
reduce the raw water in-take and improve overall water balance management of the
mine.


Enquiries
Talvivaara Mining Company Plc Tel: +358 20 7129 800
Harri Natunen, Chief Executive Officer
Saila Miettinen-Lähde, Deputy CEO and CFO

Talvivaara Mining Company Plc
Talvivaara Mining Company is an internationally significant base metals producer
with its primary focus on nickel and zinc using a technology known as
bioheapleaching to extract metals out of ore. Bioheapleaching makes extraction
of metals from low grade ore economically viable. The Talvivaara deposits
comprise one of the largest known sulphide nickel resources in Europe. The ore
body is estimated to support anticipated production for several decades.
Talvivaara has secured a 10-year off-take agreement for 100 per cent of its main
output of nickel and cobalt to Norilsk Nickel and entered into a long-term zinc
streaming agreement with Nyrstar NV. Talvivaara is listed on the London Stock
Exchange Main Market and NASDAQ OMX Helsinki and is included in the FTSE 250
Index. Further information can be found at www.talvivaara.com.

Talvivaara - Leakage detected at the gypsum pond 5.11.2012:
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Source: Talvivaaran Kaivososakeyhtiö Oyj via Thomson Reuters ONE
[HUG#1654936]




Unternehmen: Talvivaaran Kaivososakeyhtiö Oyj - ISIN: FI0009014716